The Watchtower is a NPN silicon fuzz with a transformer and switchable germanium diodes. When both diodes are engaged, you get the classic Octave Fuzz tone made famous by Jimi Hendrix on the â€˜Are You Experiencedâ€™ album. When running a single diode, you get a blistering, complex fuzz tone. As with all Flying Mo-Jo pedals, the Watchtower Fuzz is true bypass, which portrays the original 1960â€™s British tone and vibe with authentic workmanship. Hand made in the U.S.A.